What does volumetric defect detection focus on in ET?

Volumetric defect detection in electromagnetic testing (ET) is primarily concerned with identifying defects that exist within the bulk of the material rather than on the surface. These defects can include issues like voids, inclusions, or other discontinuities that are embedded in the material itself. The focus on volumetric defects is critical in ensuring the integrity and safety of components, especially in high-stress applications where internal flaws might not be visible through surface inspections.

This type of detection is essential for various industries where internal flaws can compromise the performance of the material, such as aerospace, nuclear, and structural engineering. By understanding the internal condition of the material, technicians can better assess whether the component will perform as expected under operational conditions.

In contrast, flaws occurring only on the surface, identifying coatings, and measuring thickness are aspects of other testing strategies and do not fall under the purview of volumetric defect detection in ET. This specificity reinforces the importance of understanding the different levels and locations of defects in materials for effective evaluation and maintenance strategies.